Essence Digit Gateway is one of the products in Essence Technology VoIP product series. EDG series T1/E1 performs IP to PSTN or PBX interconnection function by packetizing and depacketizing voice calls between IP and PSTN. EDG series T1/E1 is especially designed for service providers and large enterprises to offer VoIP services. With 1U form factor, a EDG T1/E1 is equipped with a main control module, two line module slots (for 4-port T1/E1 modules), and two power supply slots (for one or two 70-watt AC or DC power supplies).

Enterprises have high demand and requirement for voice processing capability of VoIP gateways. EDG series configured with one to four T1/E1 interfaces can process up to 120 concurrent calls. With powerful DSP, EDG can process various codecs ((G.711, G.729A, G.723), echo cancellation, fax relay (T.38) and so on.

EDG series support all kinds of features to satisfy various application requirements. Features include: Calling/Called Party Number Translation, Routing Selection, RADIUS Billing Interface, Second Stage Dialing and Ring-back Tone, DTMF Auto Dial, Tone Detection, RTP voice Proxy (for NAT Traversal), and T.38 Fax Relay. EDG series support ISDN PRI and SIP protocols and is the ideal PSTN termination trunking gateway for PSTN network and PBX systems.

Like other Essence VoIP products, EDG T1/E1 has the Web GUI and text configuration interfaces. A user can remotely upgrade, maintain, download log files and collect statistics from an installed EDG T1/E1.

Compared to other VoIP products on the market, EDG series embed newest VoIP technology and standards. With remote software upgrade, Users of EDG series can enjoy the latest VoIP technology.